High-reactivity coke and manufacture method thereof

Abstract

The invention provides high-reactivity coke and a manufacture method thereof, and the coke has an internal and external structure, wherein a core is prepared from blended coking coals and an external layer is prepared from high-volatile coals and blended coking coals through mixing. The method comprises: 1, blending coals; 2, preparing coal cores, comprising weighing 45% - 50% of coking coals, preparing the coal cores through crushing, binder addition, and ball-pressing, and sending into a soft asphalt spray room to spray asphalt to get the coal core; 3, processing external coking coals, comprising weighing 20% -25% of high-volatile coals, drying, crushing, screening and then sending particles with a grain size of less than 3 millimeters into a pre-mixer to evenly mix with 30% - 35% of coking coals; 4, preparing raw materials of finished products, comprising sending the external coking coals into a micro-swing mixing tank, and then putting in the coal cores to bond the external coking coals by mixing; 5, coking to get the finished coke. The high-reactivity cokes and manufacture method thereof are not only suitable for the present coke process to produce a high-reactivity and high-strength metallurgical coke with a low cost, but also can improve the operation of blast furnace production, thereby further reducing the ironmaking cost.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a method for producing multilayer high-reactivity coke for blast furnace production. Background technique [0002] When used in blast furnaces, high-reactivity coke can be loaded into the ore layer to reduce the temperature of the storage belt and play a role in energy saving and emission reduction. Regarding the acquisition of high reactivity of coke, the current research status is: [0003] 1. Improve the reactivity of coke by using a catalyst [0004] There are two basic methods of adding catalyst to coke: [0005] The first method is the "post-addition method", that is, after the coke is pushed out of the coking chamber of the coke oven, the catalyst or catalyst solution is applied to the surface of the coke, generally using Fe 3 o 4 Or CaO as a catalyst; the second method is the "pre-addition method", that is, the catalyst is first mixed with t...

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Problems solved by technology

However, this method also has relatively serious shortcomings: it is necessary to ensure that the added catalyst is mixed evenly with the raw coal in order to obtain the effect of "high reactivity and strength of coke", otherwise it will be counterproductive

However, this method is too strictly restricted by coal sources and types of coal, and cannot be used for long-term and stable industrial production.

[0010] It can be seen that no method has been found to produce coke with external high reactivity and internal high strength that is suitable for blast furnace production by using part of high volatile coal

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